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Multi-source AI news clustered, deduplicated, and scored 0–100 across authority, cluster strength, headline signal, and time decay.

  1. Why Do Humans Have Earlobes? An Evolutionary Biologist Explains

    Earlobe's biological function remains a mystery, with current research suggesting it may be an evolutionary remnant rather than serving a significant purpose. While some theories propose thermoregulation or sensory roles, these are largely unsubstantiated. Evolutionary biologists posit that earlobes might persist due to genetic drift or as a developmental byproduct, a concept known as a spandrel, rather than through direct natural selection for a specific function. AI

    Why Do Humans Have Earlobes? An Evolutionary Biologist Explains